Local equivalence ratio measurement of CH4/air and C 3H8/air laminar flames by laser-induced breakdown spectroscopy

Yuji Ikeda, Atsushi Nishiyama, Nobuyuki Kawahara, Eiji Tomita, Takashi Nakayama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Citations (Scopus)

Abstract

The local equivalence ratios of CH4/air and C3H 8/air mixtures were measured using a laser-induced breakdown spectroscopy technique with a fiber-coupled ICCD spectrometer with Cassegrain optics. Localized breakdown plasma was generated from the pulse of a Q-switched Nd:YAG laser with a wavelength of 532 nm. This system allowed us to measure laser-induced plasma spectra with high spatial and temporal resolution. The specified intensity ratio and set up equivalence ratios were well correlated and found to be a good indicator in practical measurement. The intensity ratio indicated a remarkable relationship regardless the presence of the flame. For the unburned and burned regions, there were some differences in the change in the intensity ratio, but the calibration slopes were almost similar. It was found that this technique can measure the local equivalence ratio of methane or propane premixed laminar flame regardless a flame. The intensity ratio was not a function of the incident beam intensity or flow rate, which is very acceptable for practical measurement. In this experiment, the relative error was around 5%.

Original languageEnglish
Title of host publicationCollection of Technical Papers - 44th AIAA Aerospace Sciences Meeting
Pages11586-11598
Number of pages13
Volume16
Publication statusPublished - 2006
Event44th AIAA Aerospace Sciences Meeting 2006 - Reno, NV, United States
Duration: Jan 9 2006Jan 12 2006

Other

Other44th AIAA Aerospace Sciences Meeting 2006
CountryUnited States
CityReno, NV
Period1/9/061/12/06

Fingerprint

Laser induced breakdown spectroscopy
laser-induced breakdown spectroscopy
equivalence
laser
spectroscopy
Plasmas
Optical fiber coupling
Lasers
air
Air
Propane
Spectrometers
plasma
Laser pulses
Optics
Methane
Flow rate
propane
Calibration
Cassegrain optics

ASJC Scopus subject areas

  • Space and Planetary Science
  • Aerospace Engineering

Cite this

Ikeda, Y., Nishiyama, A., Kawahara, N., Tomita, E., & Nakayama, T. (2006). Local equivalence ratio measurement of CH4/air and C 3H8/air laminar flames by laser-induced breakdown spectroscopy. In Collection of Technical Papers - 44th AIAA Aerospace Sciences Meeting (Vol. 16, pp. 11586-11598)

Local equivalence ratio measurement of CH4/air and C 3H8/air laminar flames by laser-induced breakdown spectroscopy. / Ikeda, Yuji; Nishiyama, Atsushi; Kawahara, Nobuyuki; Tomita, Eiji; Nakayama, Takashi.

Collection of Technical Papers - 44th AIAA Aerospace Sciences Meeting. Vol. 16 2006. p. 11586-11598.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ikeda, Y, Nishiyama, A, Kawahara, N, Tomita, E & Nakayama, T 2006, Local equivalence ratio measurement of CH4/air and C 3H8/air laminar flames by laser-induced breakdown spectroscopy. in Collection of Technical Papers - 44th AIAA Aerospace Sciences Meeting. vol. 16, pp. 11586-11598, 44th AIAA Aerospace Sciences Meeting 2006, Reno, NV, United States, 1/9/06.
Ikeda Y, Nishiyama A, Kawahara N, Tomita E, Nakayama T. Local equivalence ratio measurement of CH4/air and C 3H8/air laminar flames by laser-induced breakdown spectroscopy. In Collection of Technical Papers - 44th AIAA Aerospace Sciences Meeting. Vol. 16. 2006. p. 11586-11598
Ikeda, Yuji ; Nishiyama, Atsushi ; Kawahara, Nobuyuki ; Tomita, Eiji ; Nakayama, Takashi. / Local equivalence ratio measurement of CH4/air and C 3H8/air laminar flames by laser-induced breakdown spectroscopy. Collection of Technical Papers - 44th AIAA Aerospace Sciences Meeting. Vol. 16 2006. pp. 11586-11598
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